Get media share memory handle only when the filter is not a passthrough

media filter

Previously we get the share memory handle on filter opening, which only
has the information on filter types.

Now we move the share memory handle to the filter config API call so
that only the non-passthrough filter will get the share memory handle.

Test: sample tis on cuttlefish
Bug: 185627837
Change-Id: I33fd4950ec12291f6ca31a36b081d66643d5c319